You have to afford the Austrians some sympathy. They know, just know, that their economic theories are correct and just. However, they kept running into a problem: there's so much troublesome data that proves the opposite of their beliefs. One day, Ludwig von Mises discovered that the scientific method itself was flawed. So he created a new system to replace it by fiat: "praxeology." Problem solved - now science confirms everything Austrians believe. No need for data.